2-1/4″ Engineer Single Head Open Wrench 5120-00-277-1239 Armstrong 31-072

2-1/4 Inch Armstrong Single End Wrench. Single Head Open End Wrenches (also referred to as “Engineer’s” wrenches) are drop forged from steel bar. These are special purpose single end wrenches with an extra thick 15 degree angled opening designed for heavy industrial service. 1-13/16” and larger sizes have a tapered handle. NOS US Navy surplus, NSN 5120-00-277-1239. Very minor engraving may be present. New invoice is well over $100.00, GTBD7